Productivity of poplar short rotation coppice in an alley-cropping agroforestry system

Lamerre, Justine; Schwarz, Kai‐Uwe; Langhof, Maren; Wühlisch, Georg von; Greef, Jörg‐Michael

doi:10.1007/s10457-015-9825-7

Cited by 31 publications

(47 citation statements)

References 38 publications

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“…Tree rotation cycle 3-year [22] 4-year (1st rotation) [21] 3-year (2nd rotation) Tree row orientation North-South North-South Area trees (m 2 ) 70 × 70 [22,23] 11 × 25 Tree spacing (m) 2 × 0.5 [22] 1.3 × 0.9 [21] Tree planting density (ha −1 ) 10,000 [22] 8700 [21] Crop species Winter rapeseed (Brassica napus L.); Winter wheat (Triticum aestivum L.)…”

Section: Meteorological Conditionsmentioning

confidence: 99%

“…3 [20] 30 [21] Alley-cropping system Tree species Poplar (Populus nigra L. × P. maximowicii Henry, clone "Max I"), with cultivated cropped alleys Tree rotation cycle 6-year 4-year (1st rotation) 3-year (2nd rotation) Tree row orientation North-South North-South Area tree strips (m 2 ) * 10 × 225 [20] 10 × 660 [21] Tree spacing (m) 2 × 0.5 [20,22] 2.6 × 0.4 Tree planting density (ha −1 ) 10,000 [20,22] Monthly values for mean air temperature and total rainfall during the two years of investigation were used for creating Walter-Lieth climate diagrams ( Figure A1) in order to gain insight into the compound effects that influence the growth of trees and crops.…”

Section: Meteorological Conditionsmentioning

confidence: 99%

“…In order to avoid the border edge effect [25] reported at Wendhausen by Lamerre et al [22] and at Neu Sacro by Veste et al [26], we employed the dry matter woody biomass values obtained from the middle rows of the tree MPs to compare with the rows of their counterpart APs. Accordingly, the Additional information on the location, design, and harvest points of the APs is presented in Figure A2a for Wendhausen and in Figure A2b for Neu Sacro.…”

Section: Figurementioning

confidence: 99%

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Trade-Off between Energy Wood and Grain Production in Temperate Alley-Cropping Systems: An Empirical and Simulation-Based Derivation of Land Equivalent Ratio

et al. 2019

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The alley-cropping systems (ACSs), which integrate parallel tree strips at varying distances on an agricultural field can result, complementarity of resource use, in an increased land-use efficiency. Practitioners’ concerns have been directed towards the productivity of such systems given a reduced area covered by agricultural crops. The land equivalent ratio (LER) serves as a valuable productivity indicator of yield performance and land-use efficiency in ACSs, as it compares the yields achieved in monocultures to those from ACSs. Consequently, the objective of this combined experimental and simulation study was to assess the tree- and crop-yields and to derive the LER and gross energy yield for two temperate ACSs in Germany under different design scenarios, i.e., tree arrangements (lee- or wind-ward) and ratios of tree area to crop area. Both LER and gross energy yields resulted in a convex curve where the maximum values were achieved when either the tree or crop component was dominant (>75% of the land area) and minimum when these components shared similar proportions of land area. The implications of several design scenarios have been discussed in order to improve the decision-making, optimization, and adaptation of the design of ACSs with respect to site-specific characteristics.

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Section: Meteorological Conditionsmentioning

confidence: 99%

Section: Meteorological Conditionsmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

See 1 more Smart Citation

Trade-Off between Energy Wood and Grain Production in Temperate Alley-Cropping Systems: An Empirical and Simulation-Based Derivation of Land Equivalent Ratio

et al. 2019

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“…This is, however, the case for many fast-growing tree species such as poplar (Populus spp.) [36,37] and black locust (Robinia Pseudoacacia L.) [36], which show great growth variability, even when planted at the same time and on the same land area. By comparison, first-rotation poplar trees established at the experimental site Neißetal reported a standard deviation of about ±30% for the tree heights and about ±40% for the root height diameter (RHD) over three years of growth [36].…”

Section: Resultsmentioning

confidence: 99%

“…By comparison, first-rotation poplar trees established at the experimental site Neißetal reported a standard deviation of about ±30% for the tree heights and about ±40% for the root height diameter (RHD) over three years of growth [36]. At Wendhausen, the measurement variability of breast height diameter (BHD) amounted to around 39%, as compared to the average of all values and over six growing years [37].…”

Section: Resultsmentioning

confidence: 99%

Handling Data Gaps in Reported Field Measurements of Short Rotation Forestry

Seserman

Freese

2019

Data

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Filling missing data in forest research is paramount for the analysis of primary data, forest statistics, land use strategies, as well as for the calibration/validation of forest growth models. Consequently, our main objective was to investigate several methods of filling missing data under a reduced sample size. From a complete dataset containing yearly first-rotation tree growth measurements over a period of eight years, we gradually retrieved two and then four years of measurements, hence operating on 72% and 43% of the original data. Secondly, 15 statistical models, five forest growth functions, and one biophysical, process-oriented, tree growth model were employed for filling these data gap representations accounting for 72% and 43% of the available data. Several models belonging to (i) regression analysis, (ii) statistical imputation, (iii) forest growth functions, and (iv) tree growth models were applied in order to retrieve information about the trees from existing yearly measurements. Subsequently, the findings of this study could lead to finding a handy tool for both researchers and practitioners dealing with incomplete datasets. Moreover, we underline the paramount demand for far-sighted, long-term research projects for the expansion and maintenance of a short rotation forestry (SRF) repository.

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Alley cropping affects perennial bioenergy crop root distribution, carbon, and nutrient stocks

et al. 2020

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This study quantified root biomass distribution; root accrual of C, N, P, and K; and changes in soil organic carbon (SOC) associated with alley-cropped switchgrass (Panicum virgatum L.), prairie cordgrass (Spartina pectinata Bosc ex Link), intermediate wheatgrass [Thinopyrum intermedium (Host) Barkworth and Dewey 'Rush'], and a native polyculture planted between rows of 'NM6' poplar (Populus maximowiczii × P. nigra) and 'Fish Creek' willow (Salix purpurea) at two Minnesota sites (Empire and Granada). After 4 yr since establishment, SOC declined at each site but was not influenced by species selection. NM6 poplar-prairie cordgrass systems had among the highest root biomass, C, and nutrient accrual, with up to 16.3 Mg root biomass, 7.0 Mg C, 175 kg N, 31 kg P, and 97 kg K ha −1. Fine roots were the largest fraction of belowground biomass, although course roots were also a large fraction for poplar and prairie cordgrass. Tree roots extended to 6 m into the crop alley, although 85-89% were within 1 m of tree rows, depending on tree species. Crop fine root biomass was reduced up to 67% at 1 m from tree rows and 20% at 3.5 m and was up to 142% greater in willow than in poplar alleys. Total root C was predominated by poplars at Empire regardless of herbaceous crop type, whereas the proportions of tree and crop root C varied by crop at Granada. These results suggest that prairie cordgrass is well suited to alley cropping and that, due to the competitive ability of poplars, productivity, C sequestration, and nutrient accrual may be greater in willow systems in the long term.

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Productivity of poplar short rotation coppice in an alley-cropping agroforestry system

Cited by 31 publications

References 38 publications

Trade-Off between Energy Wood and Grain Production in Temperate Alley-Cropping Systems: An Empirical and Simulation-Based Derivation of Land Equivalent Ratio

Trade-Off between Energy Wood and Grain Production in Temperate Alley-Cropping Systems: An Empirical and Simulation-Based Derivation of Land Equivalent Ratio

Handling Data Gaps in Reported Field Measurements of Short Rotation Forestry

Alley cropping affects perennial bioenergy crop root distribution, carbon, and nutrient stocks

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